Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode.
Autor(a) principal: | |
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Data de Publicação: | 2002 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFOP |
Texto Completo: | http://www.repositorio.ufop.br/handle/123456789/1890 |
Resumo: | Mixtures of IrO2+MnO2 (30:70 mol%) have been electrochemically studied by cyclic voltammetry (CV) in acid solution. The crystalline structure, morphology and the electrochemical properties of the electrodes have been studied as a function of the annealing temperature. X-ray diffraction analysis (XRD), show absence of Mn2O3 phase formation and suggest the possible of formation of a solid solution of IrO2 and MnO2 mainly between 400 and 450 °C. The voltammetric behavior depends on the potential cycle number and annealing temperature employed in the preparation of the oxide layer. A good potential window in aqueous H2SO4 and high electroactive area are obtained due to the contribution of Ir redox transitions. Energy-dispersive X-ray (EDX) and scanning electron microscopy (SEM) analysis suggest an enrichment of the Ir content on the surface at the cost of the dissolution of the manganese present in the film when the electrode is submitted to the continuous potential scan. The electrodes have been found to perform well in electrochemical capacitor applications with a specific capacitance close to 550 F g−1. The large capacitance exhibited by this system arises from a combination of the double-layer capacitance and pseudocapacitance associated with surface redox-type reactions. |
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Grupioni, Andrea Alves FerreiraArashiro, EveraldoLassali, Tânia Aparecida Farias2012-11-29T12:57:00Z2012-11-29T12:57:00Z2002GRUPIONI, A. A. F.; ARASHIRO, E.; LASSALI, T. A. F. Voltammetric characterization of an iridium oxide-based system: the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. Electrochimica Acta, v. 48, n. 4, p. 407-418, dez. 2002. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0013468602006862>. Acesso em: 29 nov. 2012.00134686http://www.repositorio.ufop.br/handle/123456789/1890Mixtures of IrO2+MnO2 (30:70 mol%) have been electrochemically studied by cyclic voltammetry (CV) in acid solution. The crystalline structure, morphology and the electrochemical properties of the electrodes have been studied as a function of the annealing temperature. X-ray diffraction analysis (XRD), show absence of Mn2O3 phase formation and suggest the possible of formation of a solid solution of IrO2 and MnO2 mainly between 400 and 450 °C. The voltammetric behavior depends on the potential cycle number and annealing temperature employed in the preparation of the oxide layer. A good potential window in aqueous H2SO4 and high electroactive area are obtained due to the contribution of Ir redox transitions. Energy-dispersive X-ray (EDX) and scanning electron microscopy (SEM) analysis suggest an enrichment of the Ir content on the surface at the cost of the dissolution of the manganese present in the film when the electrode is submitted to the continuous potential scan. The electrodes have been found to perform well in electrochemical capacitor applications with a specific capacitance close to 550 F g−1. The large capacitance exhibited by this system arises from a combination of the double-layer capacitance and pseudocapacitance associated with surface redox-type reactions.Manganese dioxideElectrochemical propertiesVoltammetric behaviorSupercapacitorsIridium oxideVoltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode.info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleO periódico Electrochimica Acta concede permissão para depósito do artigo no Repositório Institucional da UFOP. Número da licença: 3347780194397.info:eu-repo/semantics/openAccessengreponame:Repositório Institucional da UFOPinstname:Universidade Federal de Ouro Preto (UFOP)instacron:UFOPLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://www.repositorio.ufop.br/bitstream/123456789/1890/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52ORIGINALARTIGO_VoltammetricCharacterizationIridium.pdfARTIGO_VoltammetricCharacterizationIridium.pdfapplication/pdf387247http://www.repositorio.ufop.br/bitstream/123456789/1890/1/ARTIGO_VoltammetricCharacterizationIridium.pdf772f4137aed3e2c507625b600d9fd408MD51123456789/18902019-03-14 13:43:05.612oai:localhost: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Repositório InstitucionalPUBhttp://www.repositorio.ufop.br/oai/requestrepositorio@ufop.edu.bropendoar:32332019-03-14T17:43:05Repositório Institucional da UFOP - Universidade Federal de Ouro Preto (UFOP)false |
dc.title.pt_BR.fl_str_mv |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
title |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
spellingShingle |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. Grupioni, Andrea Alves Ferreira Manganese dioxide Electrochemical properties Voltammetric behavior Supercapacitors Iridium oxide |
title_short |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
title_full |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
title_fullStr |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
title_full_unstemmed |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
title_sort |
Voltammetric characterization of an iridium oxide-based system : the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. |
author |
Grupioni, Andrea Alves Ferreira |
author_facet |
Grupioni, Andrea Alves Ferreira Arashiro, Everaldo Lassali, Tânia Aparecida Farias |
author_role |
author |
author2 |
Arashiro, Everaldo Lassali, Tânia Aparecida Farias |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Grupioni, Andrea Alves Ferreira Arashiro, Everaldo Lassali, Tânia Aparecida Farias |
dc.subject.por.fl_str_mv |
Manganese dioxide Electrochemical properties Voltammetric behavior Supercapacitors Iridium oxide |
topic |
Manganese dioxide Electrochemical properties Voltammetric behavior Supercapacitors Iridium oxide |
description |
Mixtures of IrO2+MnO2 (30:70 mol%) have been electrochemically studied by cyclic voltammetry (CV) in acid solution. The crystalline structure, morphology and the electrochemical properties of the electrodes have been studied as a function of the annealing temperature. X-ray diffraction analysis (XRD), show absence of Mn2O3 phase formation and suggest the possible of formation of a solid solution of IrO2 and MnO2 mainly between 400 and 450 °C. The voltammetric behavior depends on the potential cycle number and annealing temperature employed in the preparation of the oxide layer. A good potential window in aqueous H2SO4 and high electroactive area are obtained due to the contribution of Ir redox transitions. Energy-dispersive X-ray (EDX) and scanning electron microscopy (SEM) analysis suggest an enrichment of the Ir content on the surface at the cost of the dissolution of the manganese present in the film when the electrode is submitted to the continuous potential scan. The electrodes have been found to perform well in electrochemical capacitor applications with a specific capacitance close to 550 F g−1. The large capacitance exhibited by this system arises from a combination of the double-layer capacitance and pseudocapacitance associated with surface redox-type reactions. |
publishDate |
2002 |
dc.date.issued.fl_str_mv |
2002 |
dc.date.accessioned.fl_str_mv |
2012-11-29T12:57:00Z |
dc.date.available.fl_str_mv |
2012-11-29T12:57:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
GRUPIONI, A. A. F.; ARASHIRO, E.; LASSALI, T. A. F. Voltammetric characterization of an iridium oxide-based system: the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. Electrochimica Acta, v. 48, n. 4, p. 407-418, dez. 2002. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0013468602006862>. Acesso em: 29 nov. 2012. |
dc.identifier.uri.fl_str_mv |
http://www.repositorio.ufop.br/handle/123456789/1890 |
dc.identifier.issn.none.fl_str_mv |
00134686 |
identifier_str_mv |
GRUPIONI, A. A. F.; ARASHIRO, E.; LASSALI, T. A. F. Voltammetric characterization of an iridium oxide-based system: the pseudocapacitive nature of the Ir0.3Mn0.7O2 electrode. Electrochimica Acta, v. 48, n. 4, p. 407-418, dez. 2002. Disponível em: <https://www.sciencedirect.com/science/article/pii/S0013468602006862>. Acesso em: 29 nov. 2012. 00134686 |
url |
http://www.repositorio.ufop.br/handle/123456789/1890 |
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eng |
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eng |
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